US4947811A - Floating valve stem seal - Google Patents

Floating valve stem seal Download PDF

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Publication number
US4947811A
US4947811A US07/373,421 US37342189A US4947811A US 4947811 A US4947811 A US 4947811A US 37342189 A US37342189 A US 37342189A US 4947811 A US4947811 A US 4947811A
Authority
US
United States
Prior art keywords
valve stem
groove
shell
guide
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/373,421
Other languages
English (en)
Inventor
J. Dudley Binford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dana Automotive Systems Group LLC
Original Assignee
Dana Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dana Inc filed Critical Dana Inc
Assigned to DANA CORPORATION reassignment DANA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BINFORD, J. DUDLEY
Priority to US07/373,421 priority Critical patent/US4947811A/en
Priority to DE69014731T priority patent/DE69014731T2/de
Priority to EP90305712A priority patent/EP0405750B1/fr
Priority to ES90305712T priority patent/ES2065490T3/es
Priority to MX021324A priority patent/MX169703B/es
Priority to BR909003086A priority patent/BR9003086A/pt
Priority to CA002020190A priority patent/CA2020190C/fr
Priority to JP2170352A priority patent/JPH0337311A/ja
Priority to AU58082/90A priority patent/AU621022B2/en
Publication of US4947811A publication Critical patent/US4947811A/en
Application granted granted Critical
Assigned to DANA AUTOMOTIVE SYSTEMS GROUP, LLC reassignment DANA AUTOMOTIVE SYSTEMS GROUP, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DANA CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/56—Other sealings for reciprocating rods

Definitions

  • This invention relates to valve stem seals utilized in intake and exhaust manifolds of internal combustion engines. More particularly, this invention relates to concentricity of valve stem sealing elements about valve stems.
  • Valve stem seals of the type including resilient seal bodies supported within rigid cylindrical casings or shells are available in many designs and configurations. Most designs address the efficiency of the actual sealing lip portions of such seals, primarily as related to the "metering" of oil flow between the interface of the lip and the stem.
  • the rigid cylindrical shell is fixedly supported on a valve stem guide, with the inside diameter of the shell frictionally engaging the outside diameter of the guide.
  • the shell supports a sealing element adapted to be centered about the valve stem, it will be apparent to those skilled in the art that as a practical matter the valve stem and valve guide are rarely concentrically positioned. Generally, this is not a serious problem where the support portion of the shell and the lip portion of the seal body are relatively far apart. However, as the latter spacing becomes smaller, there is less flexibility in the body of the seal to accommodate radial offset between stem and guide. When eccentricity is extreme, resultant distortion of the seal body can cause non-uniform pressures on the sealing element, which in turn produces undesirable wear patterns and unpredictable oil control.
  • the valve stem seal assembly of the present invention includes an elastomeric seal body supported in a radially extending endwall of a rigid cylindrical shell.
  • the endwall contains a circular opening
  • the seal body contains an exterior circumferential groove which accommodates the endwall.
  • a predetermined amount of radial clearance between the opening of the endwall and the bottom of the groove provides a radial float annulus for accommodating stem/guide offset.
  • the circumference of the opening is slightly greater than the circumference of the bottom of the groove, so that distortion of the seal body may be avoided despite the eccentricity between stem and guide.
  • the seal body contains a separate valve guide sealing portion adapted to engage the top radial surface of the valve guide.
  • the stem sealing contact portion of the seal body is a single interior annular lip, while the metallic casing includes a plurality of circumferentially spaced, radially inwardly disposed tangs for gripping the exterior cylindrical surface of the valve guide for retension of the valve stem seal assembly on the guide.
  • FIG. 1 is a cross-sectional side view of a preferred embodiment of a valve stem seal assembly constructed in accordance with the present invention, shown under an ideal condition of concentricity between valve stem and valve guide.
  • FIG. 2 is a cross-sectional side view of the same preferred embodiment of the valve stem seal assembly constructed in accordance with the present invention, shown with the valve stem and guide being positioned in a condition of maximum eccentricity relative to one another.
  • a valve stem seal assembly 10 includes a rigid metal cylindrical casing or shell 12 having a longitudinal axis "a--a".
  • the assembly 10 includes a resilient seal body 14 preferably formed of an elastomer.
  • the body 14 includes an interior annular lip 16 which sealingly engages a valve stem 80 reciprocal within a valve guide 60.
  • the cylindrical shell 12 includes a radially extending endwall 18 at the top of the shell, the endwall containing an aperture 20 adapted to support the resilient seal body 14.
  • the exterior 24 of the seal body 14 includes a circumferential groove 22, into which the endwall extends to support the seal body 14.
  • the groove 22 includes a radially extending side wall 26 parallel to and spaced apart from a radial side wall 28 by approximately the thickness of the endwall 18 which must fit into the groove. It will be noted that the bottom 30 of the groove 22 has a circumference smaller than that of the aperture 20 of the endwall 18. This difference provides a radial float annulus 32 by which a lateral or radial clearance 34 is formed for accommodating eccentricity between the valve stem 80 and the valve guide 60.
  • the eccentricity is more clearly demonstrated by the radial offset 50 between the longitudinal axis "b--b" of the valve stem 80 and the longitudinal axis "a--a” of the shell 12 and the valve guide 60 to which the shell is fixed.
  • the radial offset 50 which can be accommodated without seal body distortion will be equal to the amount of lateral or radial clearance 34.
  • the predetermined radial clearance 34 designed into the assembly 10 should be at least equal to the anticipated maximum amount of radial offset 50 between stem and guide. Typically, such clearance would be 20 to 40 thousandths of an inch.
  • the presently preferred embodiment of the seal body 14 also includes a guide sealing member 42 adapted for engaging the radial top surface 62 of the valve guide 60, and having a frustoconical shape as shown.
  • a guide sealing member 42 adapted for engaging the radial top surface 62 of the valve guide 60, and having a frustoconical shape as shown.
  • the concept of the radial float of the valve stem seal assembly 10 as herein presented is not limited to the geometry of the guide sealing member, nor that of the stem sealing lip 16.
  • Other sealing designs and configurations may be employed.
  • the single lip 16 may instead be of a multiple lip design.
  • the presently preferred embodiment also includes a spring 44 adapted to be received within a second groove 46.
  • the groove 46 positioned in the exterior 24 of the seal body, is in approximately the same radial plane as the lip 16.
  • the interior wall 76 of the shell 12 is sized to frictionally engage the exterior surface 78 of the guide 60.
  • a number of perforated tangs 72 circumferentially disposed about the shell are adapted to grip the exterior surface 78 of the guide.
  • the shell 12 is sized so that the lower extremity 64 of the shell will contact a first annular step 66, which extends radially about the valve guide 60, upon such optimal engagement.
  • a valve coil spring 70 is adapted to engage a spring retainer connected to an intake or exhaust valve (neither shown). The opposite end of the spring 70 is supported on a second annular step 68 which also extends radially with respect to the valve guide and is integral therewith. Finally, a removal detent 74 at the extremity 64 of the shell 12 facilitates removal of the assembly 10 from the guide 60 during engine service.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)
  • Taps Or Cocks (AREA)
US07/373,421 1989-06-30 1989-06-30 Floating valve stem seal Expired - Lifetime US4947811A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US07/373,421 US4947811A (en) 1989-06-30 1989-06-30 Floating valve stem seal
DE69014731T DE69014731T2 (de) 1989-06-30 1990-05-25 Schwimmende Ventilschaftabdichtung.
EP90305712A EP0405750B1 (fr) 1989-06-30 1990-05-25 Joint flottant pour tige de soupape
ES90305712T ES2065490T3 (es) 1989-06-30 1990-05-25 Juntas para vastagos de valvulas.
MX021324A MX169703B (es) 1989-06-30 1990-06-26 Conjunto mejorado de sello del vastago de valvula
CA002020190A CA2020190C (fr) 1989-06-30 1990-06-29 Joint flottant pour tige de robinet
BR909003086A BR9003086A (pt) 1989-06-30 1990-06-29 Montagem de selo para haste de valvula
JP2170352A JPH0337311A (ja) 1989-06-30 1990-06-29 弁棒シール・アセンブリ
AU58082/90A AU621022B2 (en) 1989-06-30 1990-06-29 Floating valve stem seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/373,421 US4947811A (en) 1989-06-30 1989-06-30 Floating valve stem seal

Publications (1)

Publication Number Publication Date
US4947811A true US4947811A (en) 1990-08-14

Family

ID=23472339

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/373,421 Expired - Lifetime US4947811A (en) 1989-06-30 1989-06-30 Floating valve stem seal

Country Status (9)

Country Link
US (1) US4947811A (fr)
EP (1) EP0405750B1 (fr)
JP (1) JPH0337311A (fr)
AU (1) AU621022B2 (fr)
BR (1) BR9003086A (fr)
CA (1) CA2020190C (fr)
DE (1) DE69014731T2 (fr)
ES (1) ES2065490T3 (fr)
MX (1) MX169703B (fr)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050893A (en) * 1990-09-19 1991-09-24 Macrotech Fluid Sealing, Inc. Valve stem oil shield
US5110142A (en) * 1990-11-30 1992-05-05 Macrotech Fluid Sealing, Inc. Valve stem oil seal
US5174256A (en) * 1991-11-25 1992-12-29 Dana Corporation Variable guide height valve seal
US5237971A (en) * 1991-06-18 1993-08-24 Goetze Ag Valve stem seal assembly
US5259587A (en) * 1992-06-08 1993-11-09 Whitman Medical Corporation Roller clamp
US5553869A (en) * 1994-12-12 1996-09-10 Dana Corporation Bonded valve stem seal with retainer tangs
US5558056A (en) * 1995-11-14 1996-09-24 Freudenberg-Nok General Partnership Two-piece valve stem seal
US5584271A (en) * 1995-11-14 1996-12-17 Freudenberg-Nok General Partnership Valve stem seal
US5775284A (en) * 1997-05-07 1998-07-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
US6205969B1 (en) * 1999-12-22 2001-03-27 Dana Corporation Multi-seal retainer assembly and method for making the same
EP1087108A1 (fr) 1999-09-22 2001-03-28 Firma Carl Freudenberg Joint de queue de soupape
US6209504B1 (en) 1999-09-14 2001-04-03 Dana Corporation Heavy-duty valve stem seal
US6227548B1 (en) * 1997-08-21 2001-05-08 Cr Elastomere Gmbh Seal for machine parts that reciprocate relative to one another
US6230679B1 (en) 1999-09-10 2001-05-15 Dana Corporation Valve stem seal with pads and tangs
US6269787B1 (en) * 1999-12-22 2001-08-07 Dana Corporation Rocker cover gasket assembly with integral valve stem seals
US6367810B1 (en) 2000-02-15 2002-04-09 Federal-Mogul World Wide, Inc. Self-centering shaft seal system
US6450143B1 (en) 1999-09-14 2002-09-17 Dana Corporation Heavy-duty valve stem seal assembly
US6516769B2 (en) 2001-02-26 2003-02-11 Dana Corporation Valve seal assembly with dual finger retainer system
US20030146580A1 (en) * 2002-02-01 2003-08-07 Hegemier Timothy Alan Valve seal assembly with multiple leg retainer
US6609700B2 (en) 2001-05-31 2003-08-26 Dana Corporation Valve seal assembly with spring finger retainer
US6647943B2 (en) 2001-07-31 2003-11-18 Dana Corporation Valve stem seal assembly with locator system
US20040113368A1 (en) * 2002-10-16 2004-06-17 Karl Smirra Sealing device and method for assembling the sealing device
US6764079B1 (en) * 2002-04-19 2004-07-20 Dana Corporation Valve seal assembly with straight-walled retainer
US6901902B1 (en) * 2004-02-25 2005-06-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
US20050184480A1 (en) * 2004-02-25 2005-08-25 Arlt George E. Boot shield
US20070278441A1 (en) * 2006-06-01 2007-12-06 Leimer Mark A Articulating guide seal
US20080211388A1 (en) * 2007-02-20 2008-09-04 Nec Lighting, Ltd. Light emitting semiconductor device
US20090146382A1 (en) * 2007-12-06 2009-06-11 Freudenberg-Nok General Partnership Valve Stem Seal With Gas Relief Features
US20090145393A1 (en) * 2007-12-06 2009-06-11 Freudenberg-Nok General Partnership Valve Stem Seal With Gas Relief Features
EP2112337A1 (fr) * 2008-04-23 2009-10-28 Carl Freudenberg KG Joint de tige de soupape
US20100295252A1 (en) * 2009-05-20 2010-11-25 Freudenberg-Nok General Partnership Two-Piece Valve Stem Seal
US20110024666A1 (en) * 2009-07-30 2011-02-03 Freudenberg-Nok General Partnership Reduced Inertia Valve Stem Seal Flange
US20140251253A1 (en) * 2013-03-07 2014-09-11 Freudenberg-Nok General Partnership Pressure Support For Engine Valve Stem Seals
US9371749B2 (en) 2012-02-08 2016-06-21 Dana Automotive Systems Group, Llc Hybrid valve stem seal retainer assembly
US20170009616A1 (en) * 2014-01-22 2017-01-12 Nok Corporation Valve stem seal
US20190309662A1 (en) * 2018-04-04 2019-10-10 Freudenberg Sealing Technologies S.A.S. Di Externa Italia S.R.L.U. Gasket with an improved heat dissipation capacity for a valve of an internal combustion engine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632606A (en) * 1993-11-23 1997-05-27 Sarcos Group Volumetric pump/valve
US6679502B1 (en) * 2001-08-28 2004-01-20 Dana Corporation Valve stem seal assembly with valve guide retainer
DE102019208468A1 (de) * 2018-06-18 2019-12-19 Aktiebolaget Skf Dichteinheit für Gabelrohre von Fahrrädern oder Motorrädern

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157867A (en) * 1935-12-24 1939-05-09 Wilkening Mfg Co Valve stem packing
US3069174A (en) * 1959-02-05 1962-12-18 Robert T Skinner Seal
US3235271A (en) * 1964-09-01 1966-02-15 Hastings Mfg Co Flexible shaft seal having a tilting sealing tip
US3372941A (en) * 1965-01-26 1968-03-12 Illinois Milling Inc Valve seal
US3379445A (en) * 1965-03-30 1968-04-23 Garlock Inc Seal for axially movable rod
US3459166A (en) * 1967-08-18 1969-08-05 Trw Inc Valve spring retainer and valve stem oil shield assembly and method of assembly
US3498621A (en) * 1968-04-25 1970-03-03 Dana Corp Valve stem seal
US3498622A (en) * 1966-09-24 1970-03-03 Teves Kg Alfred Dust caps for fluid cylinders
US3531134A (en) * 1969-06-06 1970-09-29 K Line Ind Inc Seal retainer
US3554180A (en) * 1969-03-21 1971-01-12 Gen Motors Corp Valve stem seal
US3599992A (en) * 1970-05-07 1971-08-17 Line Tool Co K Valve seal
US3699942A (en) * 1971-02-17 1972-10-24 Forest J Moray Adjustable valve stem oil seals for old and new internal combustion engines
US3771800A (en) * 1972-08-24 1973-11-13 Eagle Picher Ind Inc Valve stem seal
DE2312135A1 (de) * 1973-03-12 1974-09-19 Pampus Kg Dichtung, insbesondere fuer ventilschaefte
US4474379A (en) * 1982-03-18 1984-10-02 Firma Carl Freudenberg Centrifugally-operated radially-translatable seal ring
US4494759A (en) * 1983-10-31 1985-01-22 Kieffer Robert A Seal for relatively rotatable parts
US4502696A (en) * 1984-07-02 1985-03-05 K-Line Industries, Inc. Valve seal retainer with multiple diameter boot base
US4531483A (en) * 1981-09-18 1985-07-30 Goetze Ag Lip sealing ring in an internal combustion engine
US4773363A (en) * 1987-05-01 1988-09-27 Microdot Inc. Fixed valve stem oil deflector
US4811960A (en) * 1987-08-10 1989-03-14 Microdot Inc. Fixed valve stem oil seal
US4811704A (en) * 1988-03-07 1989-03-14 Vernay Laboratories, Inc. Valve stem seal
US4834037A (en) * 1987-10-14 1989-05-30 Dana Corporation Unitary molded plastic valve seal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157866A (en) * 1935-12-24 1939-05-09 Wilkening Mfg Co Valve stem packing
FR1175827A (fr) * 1957-05-28 1959-04-02 Simca Automobiles Sa Perfectionnement apporté aux joints d'étanchéité
US3228384A (en) * 1964-12-07 1966-01-11 William G Brown Valve stem sealing means with positive stem lubrication
DE1750200A1 (de) * 1968-04-06 1971-02-11 Alois Ferch Mehrteilige Ventilschaftabdichtung fuer Brennkraftmaschinen od.dgl.
DE6933319U (de) * 1969-08-22 1969-12-11 Lechler Elring Dichtungswerke Ventilschaftdichtung
US4695061A (en) * 1985-08-29 1987-09-22 Eagle-Picher Industries, Inc. Valve stem seal
US4909202A (en) * 1989-06-30 1990-03-20 Dana Corporation Frustoconical valve stem sealing element

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157867A (en) * 1935-12-24 1939-05-09 Wilkening Mfg Co Valve stem packing
US3069174A (en) * 1959-02-05 1962-12-18 Robert T Skinner Seal
US3235271A (en) * 1964-09-01 1966-02-15 Hastings Mfg Co Flexible shaft seal having a tilting sealing tip
US3372941A (en) * 1965-01-26 1968-03-12 Illinois Milling Inc Valve seal
US3379445A (en) * 1965-03-30 1968-04-23 Garlock Inc Seal for axially movable rod
US3498622A (en) * 1966-09-24 1970-03-03 Teves Kg Alfred Dust caps for fluid cylinders
US3459166A (en) * 1967-08-18 1969-08-05 Trw Inc Valve spring retainer and valve stem oil shield assembly and method of assembly
US3498621A (en) * 1968-04-25 1970-03-03 Dana Corp Valve stem seal
US3554180A (en) * 1969-03-21 1971-01-12 Gen Motors Corp Valve stem seal
US3531134A (en) * 1969-06-06 1970-09-29 K Line Ind Inc Seal retainer
US3599992A (en) * 1970-05-07 1971-08-17 Line Tool Co K Valve seal
US3699942A (en) * 1971-02-17 1972-10-24 Forest J Moray Adjustable valve stem oil seals for old and new internal combustion engines
US3771800A (en) * 1972-08-24 1973-11-13 Eagle Picher Ind Inc Valve stem seal
DE2312135A1 (de) * 1973-03-12 1974-09-19 Pampus Kg Dichtung, insbesondere fuer ventilschaefte
US4531483A (en) * 1981-09-18 1985-07-30 Goetze Ag Lip sealing ring in an internal combustion engine
US4474379A (en) * 1982-03-18 1984-10-02 Firma Carl Freudenberg Centrifugally-operated radially-translatable seal ring
US4494759A (en) * 1983-10-31 1985-01-22 Kieffer Robert A Seal for relatively rotatable parts
US4502696A (en) * 1984-07-02 1985-03-05 K-Line Industries, Inc. Valve seal retainer with multiple diameter boot base
US4773363A (en) * 1987-05-01 1988-09-27 Microdot Inc. Fixed valve stem oil deflector
US4811960A (en) * 1987-08-10 1989-03-14 Microdot Inc. Fixed valve stem oil seal
US4834037A (en) * 1987-10-14 1989-05-30 Dana Corporation Unitary molded plastic valve seal
US4811704A (en) * 1988-03-07 1989-03-14 Vernay Laboratories, Inc. Valve stem seal

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050893A (en) * 1990-09-19 1991-09-24 Macrotech Fluid Sealing, Inc. Valve stem oil shield
US5110142A (en) * 1990-11-30 1992-05-05 Macrotech Fluid Sealing, Inc. Valve stem oil seal
US5237971A (en) * 1991-06-18 1993-08-24 Goetze Ag Valve stem seal assembly
US5174256A (en) * 1991-11-25 1992-12-29 Dana Corporation Variable guide height valve seal
EP0544458A1 (fr) * 1991-11-25 1993-06-02 Dana Corporation Dispositif d'étanchéité pour tige de soupape
US5259587A (en) * 1992-06-08 1993-11-09 Whitman Medical Corporation Roller clamp
US5553869A (en) * 1994-12-12 1996-09-10 Dana Corporation Bonded valve stem seal with retainer tangs
US5558056A (en) * 1995-11-14 1996-09-24 Freudenberg-Nok General Partnership Two-piece valve stem seal
US5584271A (en) * 1995-11-14 1996-12-17 Freudenberg-Nok General Partnership Valve stem seal
US5775284A (en) * 1997-05-07 1998-07-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
EP0877150A1 (fr) 1997-05-07 1998-11-11 Firma Carl Freudenberg Joint de tige de soupape en deux parties
US6227548B1 (en) * 1997-08-21 2001-05-08 Cr Elastomere Gmbh Seal for machine parts that reciprocate relative to one another
US6230679B1 (en) 1999-09-10 2001-05-15 Dana Corporation Valve stem seal with pads and tangs
US6450143B1 (en) 1999-09-14 2002-09-17 Dana Corporation Heavy-duty valve stem seal assembly
US6209504B1 (en) 1999-09-14 2001-04-03 Dana Corporation Heavy-duty valve stem seal
EP1087108A1 (fr) 1999-09-22 2001-03-28 Firma Carl Freudenberg Joint de queue de soupape
US6269787B1 (en) * 1999-12-22 2001-08-07 Dana Corporation Rocker cover gasket assembly with integral valve stem seals
US6205969B1 (en) * 1999-12-22 2001-03-27 Dana Corporation Multi-seal retainer assembly and method for making the same
US6367810B1 (en) 2000-02-15 2002-04-09 Federal-Mogul World Wide, Inc. Self-centering shaft seal system
US6516769B2 (en) 2001-02-26 2003-02-11 Dana Corporation Valve seal assembly with dual finger retainer system
US6609700B2 (en) 2001-05-31 2003-08-26 Dana Corporation Valve seal assembly with spring finger retainer
US6647943B2 (en) 2001-07-31 2003-11-18 Dana Corporation Valve stem seal assembly with locator system
US20030146580A1 (en) * 2002-02-01 2003-08-07 Hegemier Timothy Alan Valve seal assembly with multiple leg retainer
US6764079B1 (en) * 2002-04-19 2004-07-20 Dana Corporation Valve seal assembly with straight-walled retainer
US20040113368A1 (en) * 2002-10-16 2004-06-17 Karl Smirra Sealing device and method for assembling the sealing device
US7401792B2 (en) * 2002-10-16 2008-07-22 Siemens Aktiengesellschaft Sealing device and method for assembling the sealing device
USRE40764E1 (en) 2004-02-25 2009-06-23 Freudenbery-Nok General Partnership Two-piece valve stem seal
US20050184480A1 (en) * 2004-02-25 2005-08-25 Arlt George E. Boot shield
US6901902B1 (en) * 2004-02-25 2005-06-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
US20070278441A1 (en) * 2006-06-01 2007-12-06 Leimer Mark A Articulating guide seal
US8246006B2 (en) 2006-06-01 2012-08-21 Dana Automotive Systems Group, Llc Articulating guide seal
US20080211388A1 (en) * 2007-02-20 2008-09-04 Nec Lighting, Ltd. Light emitting semiconductor device
US8011669B2 (en) 2007-12-06 2011-09-06 Freudenberg-Nok General Partnership Valve stem seal with gas relief features
US20090146382A1 (en) * 2007-12-06 2009-06-11 Freudenberg-Nok General Partnership Valve Stem Seal With Gas Relief Features
US9988950B2 (en) 2007-12-06 2018-06-05 Freudenberg-Nok General Partnership Valve stem seal with gas relief features
US8668203B2 (en) 2007-12-06 2014-03-11 Freudenberg-Nok General Partnership Valve stem seal with gas relief features
US20090145393A1 (en) * 2007-12-06 2009-06-11 Freudenberg-Nok General Partnership Valve Stem Seal With Gas Relief Features
US8235394B2 (en) 2007-12-06 2012-08-07 Freudenberg-Nok General Partnership Valve stem seal with gas relief features
EP2112337A1 (fr) * 2008-04-23 2009-10-28 Carl Freudenberg KG Joint de tige de soupape
US9500106B2 (en) 2009-05-20 2016-11-22 Freudenberg—NOK General Partnership Two-piece valve stem seal
US20100295252A1 (en) * 2009-05-20 2010-11-25 Freudenberg-Nok General Partnership Two-Piece Valve Stem Seal
EP2295742A1 (fr) 2009-07-30 2011-03-16 Carl Freudenberg KG Bride de joint de tige de soupape d'inertie réduite
US9416690B2 (en) 2009-07-30 2016-08-16 Freudenberg-Nok General Partnership Reduced inertia valve stem seal flange
US20110024666A1 (en) * 2009-07-30 2011-02-03 Freudenberg-Nok General Partnership Reduced Inertia Valve Stem Seal Flange
US9371749B2 (en) 2012-02-08 2016-06-21 Dana Automotive Systems Group, Llc Hybrid valve stem seal retainer assembly
US20140251253A1 (en) * 2013-03-07 2014-09-11 Freudenberg-Nok General Partnership Pressure Support For Engine Valve Stem Seals
US8893681B2 (en) * 2013-03-07 2014-11-25 Freudenberg-Nok General Partnership Pressure support for engine valve stem seals
US20170009616A1 (en) * 2014-01-22 2017-01-12 Nok Corporation Valve stem seal
US10508570B2 (en) * 2014-01-22 2019-12-17 Nok Corporation Valve stem seal
US20190309662A1 (en) * 2018-04-04 2019-10-10 Freudenberg Sealing Technologies S.A.S. Di Externa Italia S.R.L.U. Gasket with an improved heat dissipation capacity for a valve of an internal combustion engine
US10746062B2 (en) * 2018-04-04 2020-08-18 Freudenberg Sealing Technologies S.A.S. Di Externa Italia S.R.L.U. Gasket with an improved heat dissipation capacity for a valve of an internal combustion engine

Also Published As

Publication number Publication date
AU5808290A (en) 1991-01-03
ES2065490T3 (es) 1995-02-16
JPH0337311A (ja) 1991-02-18
CA2020190A1 (fr) 1990-12-31
EP0405750B1 (fr) 1994-12-07
DE69014731T2 (de) 1995-04-27
AU621022B2 (en) 1992-02-27
BR9003086A (pt) 1991-08-27
MX169703B (es) 1993-07-19
EP0405750A1 (fr) 1991-01-02
DE69014731D1 (de) 1995-01-19
CA2020190C (fr) 2000-08-22

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